Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 361 · 40 questions

Engineer's tip (Find the topic, use the idea): Find the topic: force, friction, machine, lever class, balance, pulley or work. Use that lesson’s rule — what is in the middle, load × distance = effort × distance, effort = load ÷ ropes, work = force × distance. Write the calculation before you answer.

1. 1.🏋️ Pushing a crate 3 m took 1440 J of work. What force was used, in newtons?
2. 2.Which of these is caused by magnetic force? (a) a fridge magnet sticks (b) rain falls to the ground (c) lifting a school bag (d) brakes stop a bicycle
3. 3.💪 Which force is at work: lifting a school bag? (a) gravity (b) friction (c) magnetic force (d) muscular force
4. 4.🪝 A winch has a wheel of radius 20 cm and an axle of radius 5 cm. What effort on the wheel lifts a 440 N bucket on the axle, in newtons? (ideal)
5. 5.⚙️ Which simple machine is a jar lid? (a) wedge (b) pulley (c) lever (d) screw
6. 6.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull
7. 7.⚖️ Which class of lever is a broom when sweeping? (a) class 3 (b) class 1 (c) class 2
8. 8.⚖️ A seesaw balances. Zoya (600 N) sits ? m from the pivot on one side; Meena (800 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
9. 9.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
10. 10.💪 In a tug of war, one team pulls right with 60 N and the other pulls left with 20 N. What is the size of the net force, in newtons?
11. 11.True or false: a wet tiled floor gives more friction. (a) False (b) True
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, sandpaper 7 N, ice 1 N, a glass sheet 5 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a glass sheet (d) sandpaper
13. 13.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
14. 14.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) time taken (d) distance from fulcrum
15. 15.🏋️ A force of 70 N did 700 J of work. How many metres did the object move?
16. 16.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
17. 17.💪 A force is a … (a) kind of colour (b) unit of time (c) type of sound (d) push or a pull
18. 18.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
19. 19.⚙️ A wedge is … (a) a wheel on a rod (b) a rope on a wheel (c) two ramps back to back (d) a bar on a pivot
20. 20.🪝 A winch has a wheel of radius 40 cm and an axle of radius 5 cm. What effort on the wheel lifts a 1280 N bucket on the axle, in newtons? (ideal)
21. 21.True or false: a door stopper is an inclined plane. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a window blind cord (c) a flagpole rope wheel (d) a chisel
23. 23.💪 In which unit do we measure force? (a) metre (m) (b) litre (L) (c) second (s) (d) newton (N)
24. 24.True or false: a tyre with deep treads gives less friction. (a) False (b) True
25. 25.💪 A box weighs 590 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
26. 26.Which of these is caused by friction? (a) lifting a school bag (b) brakes stop a bicycle (c) a magnet picks up pins (d) pedalling a cycle
27. 27.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
28. 28.⚖️ A lever bar balances. The load is 490 N at 50 cm from the fulcrum. The effort is 350 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
29. 29.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
30. 30.True or false: pushing a trolley is a push. (a) True (b) False
31. 31.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
32. 32.⚙️ Which simple machine is a water tap handle? (a) screw (b) lever (c) wheel and axle (d) inclined plane
33. 33.True or false: a wheelchair ramp is a wheel and axle. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a smooth steel slide (c) powder on a carrom board (d) skating on ice
35. 35.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
36. 36.⚖️ A seesaw balances. Ravi (100 N) sits 2 m from the pivot on one side; Kabir (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
37. 37.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 50 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
39. 39.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
40. 40.True or false: a rough doormat gives more friction. (a) False (b) True

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